Q1: What kind of PCB material do you use? A: FR4, High Tg FR4, Rogers, Aluminum Based.Q2: What kind of PCB file format can you accept for production? A:Gerber, PROTEL 99SE, PROTEL DXP, POWER PCB, CAM350, GCCAM, ODB+(.TGZ)Q3: What mode of transport do you use? A:Air transportation, eg. UPS, DHL, FedEx etc.Q4:What is lead time? A:Single/Double Sided:10 to 14 working days 4-8 Layers:12 to 14 working days More than 8 layers:14 to 20 working days The lead time is depends on your final confirmed quantity.